If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

You can see it everyday, But cannot touch it at will. What is it?

Forwards I am heavy, backward I am not. What am I?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?

What is the next number in this matchsticks series riddle?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

What question can you never answer yes to?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

Can you count the number of triangles in the given picture?